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A firework accidently explodes while on the ground. The firework was initially at rest and breaks...

A firework accidently explodes while on the ground. The firework was initially at rest and breaks into 2 pieces in the explosion. Piece A has   3.00   times the mass of piece B.

If 5800 J is released in the explosion, and 90% of that energy goes into the kinetic energy of the 2 pieces, what is the final KE of piece A and piece B?    KEA, KEB =?
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